<!DOCTYPE html>
<html>
  <head>
      <meta charset="UTF-8">
      <title>消息对话框</title>
      <script src="event.js"></script>
  </head>
  <body>
  <button onclick="onClick_MessageBox()">显示简单的消息对话框</button>
  <p/>
  <button onclick="onClick_MessageBoxIcon()">定制消息对话框的图标</button>
  <p/>
  <button onclick="onClick_MessageBoxType()">设置消息对话框的类型</button>
  <p/>
  <button onclick="onClick_MessageBoxMultiButtons()">为消息对话框添加多个按钮</button>
  <p/>
  <label id="label"></label>
  </body>

</html>
